<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"> <style>
	.KEYW {color: #933;}
	.COMM {color: #bbb; font-style: italic;}
	.NUMB {color: #393;}
	.STRN {color: #393;}
	.REGX {color: #339;}
	.line {border-right: 1px dotted #666; color: #666; font-style: normal;}
	</style></head><body><pre><span class='line'>  1</span> <span class="COMM">/**
<span class='line'>  2</span>  * Hilo
<span class='line'>  3</span>  * Copyright 2015 alibaba.com
<span class='line'>  4</span>  * Licensed under the MIT License
<span class='line'>  5</span>  */</span><span class="WHIT">
<span class='line'>  6</span> 
<span class='line'>  7</span> </span><span class="COMM">/**
<span class='line'>  8</span>  * &lt;iframe src='../../../examples/Text.html?noHeader' width = '320' height = '240' scrolling='no'>&lt;/iframe>
<span class='line'>  9</span>  * &lt;br/>
<span class='line'> 10</span>  * @class Text类提供简单的文字显示功能。复杂的文本功能可以使用DOMElement。
<span class='line'> 11</span>  * @augments View
<span class='line'> 12</span>  * @mixes CacheMixin
<span class='line'> 13</span>  * @borrows CacheMixin#cache as #cache
<span class='line'> 14</span>  * @borrows CacheMixin#updateCache as #updateCache
<span class='line'> 15</span>  * @borrows CacheMixin#setCacheDirty as #setCacheDirty
<span class='line'> 16</span>  * @param {Object} properties 创建对象的属性参数。可包含此类所有可写属性。
<span class='line'> 17</span>  * @module hilo/view/Text
<span class='line'> 18</span>  * @requires hilo/core/Class
<span class='line'> 19</span>  * @requires hilo/core/Hilo
<span class='line'> 20</span>  * @requires hilo/view/View
<span class='line'> 21</span>  * @requires hilo/view/CacheMixin
<span class='line'> 22</span>  * @property {String} text 指定要显示的文本内容。
<span class='line'> 23</span>  * @property {String} color 指定使用的字体颜色。
<span class='line'> 24</span>  * @property {String} textAlign 指定文本的对齐方式。可以是以下任意一个值：'start', 'end', 'left', 'right', and 'center'。注意：必须设置文本的 width 属性才能生效。
<span class='line'> 25</span>  * @property {String} textVAlign 指定文本的垂直对齐方式。可以是以下任意一个值：'top', 'middle', 'bottom'。注意：必须设置文本的 height 属性才能生效。
<span class='line'> 26</span>  * @property {Boolean} outline 指定文本是绘制边框还是填充。
<span class='line'> 27</span>  * @property {Number} lineSpacing 指定文本的行距。单位为像素。默认值为0。
<span class='line'> 28</span>  * @property {Number} maxWidth 指定文本的最大宽度。默认值为200。
<span class='line'> 29</span>  * @property {String} font 文本的字体CSS样式。只读属性。设置字体样式请用setFont方法。
<span class='line'> 30</span>  * @property {Number} textWidth 指示文本内容的宽度，只读属性。仅在canvas模式下有效。
<span class='line'> 31</span>  * @property {Number} textHeight 指示文本内容的高度，只读属性。仅在canvas模式下有效。
<span class='line'> 32</span>  */</span><span class="WHIT">
<span class='line'> 33</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">Text</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Class.create</span><span class="PUNC">(</span><span class="COMM">/** @lends Text.prototype */</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 34</span> </span><span class="WHIT">    </span><span class="NAME">Extends</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NAME">View</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 35</span> </span><span class="WHIT">    </span><span class="NAME">Mixes</span><span class="PUNC">:</span><span class="NAME">CacheMixin</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 36</span> </span><span class="WHIT">    </span><span class="NAME">constructor</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">properties</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 37</span> </span><span class="WHIT">        </span><span class="NAME">properties</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">properties</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 38</span> </span><span class="WHIT">        </span><span class="NAME">this.id</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">this.id</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="NAME">properties.id</span><span class="WHIT"> </span><span class="PUNC">||</span><span class="WHIT"> </span><span class="NAME">Hilo.getUid</span><span class="PUNC">(</span><span class="STRN">'Text'</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 39</span> </span><span class="WHIT">        </span><span class="NAME">Text.superclass.constructor.call</span><span class="PUNC">(</span><span class="KEYW">this</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">properties</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 40</span> 
<span class='line'> 41</span> </span><span class="WHIT">        </span><span class="COMM">// if(!properties.width) this.width = 200; //default width</span><span class="WHIT">
<span class='line'> 42</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">properties.font</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">this.font</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">'12px arial'</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="COMM">//default font style</span><span class="WHIT">
<span class='line'> 43</span> </span><span class="WHIT">        </span><span class="NAME">this._fontHeight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Text.measureFontHeight</span><span class="PUNC">(</span><span class="NAME">this.font</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 44</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 45</span> 
<span class='line'> 46</span> </span><span class="WHIT">    </span><span class="NAME">text</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="STRN">''</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 47</span> </span><span class="WHIT">    </span><span class="NAME">color</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="STRN">'#000'</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 48</span> </span><span class="WHIT">    </span><span class="NAME">textAlign</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 49</span> </span><span class="WHIT">    </span><span class="NAME">textVAlign</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 50</span> </span><span class="WHIT">    </span><span class="NAME">outline</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">false</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 51</span> </span><span class="WHIT">    </span><span class="NAME">lineSpacing</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 52</span> </span><span class="WHIT">    </span><span class="NAME">maxWidth</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">200</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 53</span> </span><span class="WHIT">    </span><span class="NAME">font</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">null</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="COMM">//ready-only</span><span class="WHIT">
<span class='line'> 54</span> </span><span class="WHIT">    </span><span class="NAME">textWidth</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="COMM">//read-only</span><span class="WHIT">
<span class='line'> 55</span> </span><span class="WHIT">    </span><span class="NAME">textHeight</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="COMM">//read-only</span><span class="WHIT">
<span class='line'> 56</span> 
<span class='line'> 57</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 58</span>      * 设置文本的字体CSS样式。
<span class='line'> 59</span>      * @param {String} font 要设置的字体CSS样式。
<span class='line'> 60</span>      * @returns {Text} Text对象本身。链式调用支持。
<span class='line'> 61</span>      */</span><span class="WHIT">
<span class='line'> 62</span> </span><span class="WHIT">    </span><span class="NAME">setFont</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">font</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 63</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">me</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 64</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">me.font</span><span class="WHIT"> </span><span class="PUNC">!==</span><span class="WHIT"> </span><span class="NAME">font</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 65</span> </span><span class="WHIT">            </span><span class="NAME">me.font</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">font</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 66</span> </span><span class="WHIT">            </span><span class="NAME">me._fontHeight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Text.measureFontHeight</span><span class="PUNC">(</span><span class="NAME">font</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 67</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 68</span> 
<span class='line'> 69</span> </span><span class="WHIT">        </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">me</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 70</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'> 71</span> 
<span class='line'> 72</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'> 73</span>      * 覆盖渲染方法。
<span class='line'> 74</span>      * @private
<span class='line'> 75</span>      */</span><span class="WHIT">
<span class='line'> 76</span> </span><span class="WHIT">    </span><span class="NAME">render</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">renderer</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">delta</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 77</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">me</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 78</span> 
<span class='line'> 79</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">renderer.renderType</span><span class="WHIT"> </span><span class="PUNC">===</span><span class="WHIT"> </span><span class="STRN">'canvas'</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 80</span> </span><span class="WHIT">            </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">this.drawable</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 81</span> </span><span class="WHIT">                </span><span class="NAME">renderer.draw</span><span class="PUNC">(</span><span class="NAME">me</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 82</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 83</span> </span><span class="WHIT">            </span><span class="KEYW">else</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 84</span> </span><span class="WHIT">                </span><span class="NAME">me._draw</span><span class="PUNC">(</span><span class="NAME">renderer.context</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 85</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 86</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 87</span> </span><span class="WHIT">        </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">renderer.renderType</span><span class="WHIT"> </span><span class="PUNC">===</span><span class="WHIT"> </span><span class="STRN">'dom'</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 88</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">drawable</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.drawable</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 89</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">domElement</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">drawable.domElement</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 90</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">style</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">domElement.style</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 91</span> 
<span class='line'> 92</span> </span><span class="WHIT">            </span><span class="NAME">style.font</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.font</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 93</span> </span><span class="WHIT">            </span><span class="NAME">style.textAlign</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.textAlign</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 94</span> </span><span class="WHIT">            </span><span class="NAME">style.color</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.color</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 95</span> </span><span class="WHIT">            </span><span class="NAME">style.width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.width</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'px'</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 96</span> </span><span class="WHIT">            </span><span class="NAME">style.height</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.height</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'px'</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 97</span> </span><span class="WHIT">            </span><span class="NAME">style.lineHeight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">me._fontHeight</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">me.lineSpacing</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="STRN">'px'</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 98</span> 
<span class='line'> 99</span> </span><span class="WHIT">            </span><span class="NAME">domElement.innerHTML</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.text</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>100</span> </span><span class="WHIT">            </span><span class="NAME">renderer.draw</span><span class="PUNC">(</span><span class="KEYW">this</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>101</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>102</span> </span><span class="WHIT">        </span><span class="KEYW">else</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>103</span> </span><span class="WHIT">            </span><span class="COMM">//TODO:自动更新cache  TODO:auto update cache</span><span class="WHIT">
<span class='line'>104</span> </span><span class="WHIT">            </span><span class="NAME">me.cache</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>105</span> </span><span class="WHIT">            </span><span class="NAME">renderer.draw</span><span class="PUNC">(</span><span class="NAME">me</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>106</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>107</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>108</span> 
<span class='line'>109</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>110</span>      * 在指定的渲染上下文上绘制文本。
<span class='line'>111</span>      * @private
<span class='line'>112</span>      */</span><span class="WHIT">
<span class='line'>113</span> </span><span class="WHIT">    </span><span class="NAME">_draw</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">context</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>114</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">me</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">text</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.text.toString</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>115</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">text</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="KEYW">return</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>116</span> 
<span class='line'>117</span> </span><span class="WHIT">        </span><span class="COMM">//set drawing style</span><span class="WHIT">
<span class='line'>118</span> </span><span class="WHIT">        </span><span class="NAME">context.font</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.font</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>119</span> </span><span class="WHIT">        </span><span class="NAME">context.textAlign</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.textAlign</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>120</span> </span><span class="WHIT">        </span><span class="NAME">context.textBaseline</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">'top'</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>121</span> 
<span class='line'>122</span> </span><span class="WHIT">        </span><span class="COMM">//find and draw all explicit lines</span><span class="WHIT">
<span class='line'>123</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">lines</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">text.split</span><span class="PUNC">(</span><span class="REGX">/\r\n|\r|\n|&lt;br(?:[ \/])*>/</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>124</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>125</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">lineHeight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me._fontHeight</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">me.lineSpacing</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>126</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">line</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">w</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">len</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">wlen</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>127</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">drawLines</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">[</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>128</span> 
<span class='line'>129</span> </span><span class="WHIT">        </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">len</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">lines.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">len</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="PUNC">++</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>130</span> </span><span class="WHIT">            </span><span class="NAME">line</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">lines</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>131</span> </span><span class="WHIT">            </span><span class="NAME">w</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">context.measureText</span><span class="PUNC">(</span><span class="NAME">line</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>132</span> 
<span class='line'>133</span> </span><span class="WHIT">            </span><span class="COMM">//check if the line need to split</span><span class="WHIT">
<span class='line'>134</span> </span><span class="WHIT">            </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">w</span><span class="WHIT"> </span><span class="PUNC">&lt;=</span><span class="WHIT"> </span><span class="NAME">me.maxWidth</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>135</span> </span><span class="WHIT">                </span><span class="NAME">drawLines.push</span><span class="PUNC">(</span><span class="PUNC">{</span><span class="NAME">text</span><span class="PUNC">:</span><span class="NAME">line</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">:</span><span class="NAME">height</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>136</span> </span><span class="WHIT">                </span><span class="COMM">// me._drawTextLine(context, line, height);</span><span class="WHIT">
<span class='line'>137</span> </span><span class="WHIT">                </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">w</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">w</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>138</span> </span><span class="WHIT">                </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">lineHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>139</span> </span><span class="WHIT">                </span><span class="KEYW">continue</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>140</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>141</span> 
<span class='line'>142</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">str</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">''</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">oldWidth</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">newWidth</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">j</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">word</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>143</span> 
<span class='line'>144</span> </span><span class="WHIT">            </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">wlen</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">line.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">wlen</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">j</span><span class="PUNC">++</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>145</span> </span><span class="WHIT">                </span><span class="NAME">word</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">line</span><span class="PUNC">[</span><span class="NAME">j</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>146</span> </span><span class="WHIT">                </span><span class="NAME">newWidth</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">context.measureText</span><span class="PUNC">(</span><span class="NAME">str</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">word</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>147</span> 
<span class='line'>148</span> </span><span class="WHIT">                </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">newWidth</span><span class="WHIT"> </span><span class="PUNC">></span><span class="WHIT"> </span><span class="NAME">me.maxWidth</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>149</span> </span><span class="WHIT">                    </span><span class="NAME">drawLines.push</span><span class="PUNC">(</span><span class="PUNC">{</span><span class="NAME">text</span><span class="PUNC">:</span><span class="NAME">str</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">:</span><span class="NAME">height</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>150</span> </span><span class="WHIT">                    </span><span class="COMM">// me._drawTextLine(context, str, height);</span><span class="WHIT">
<span class='line'>151</span> </span><span class="WHIT">                    </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">oldWidth</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">oldWidth</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>152</span> </span><span class="WHIT">                    </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">lineHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>153</span> </span><span class="WHIT">                    </span><span class="NAME">str</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">word</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>154</span> </span><span class="WHIT">                </span><span class="PUNC">}</span><span class="KEYW">else</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>155</span> </span><span class="WHIT">                    </span><span class="NAME">oldWidth</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">newWidth</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>156</span> </span><span class="WHIT">                    </span><span class="NAME">str</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">word</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>157</span> </span><span class="WHIT">                </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>158</span> 
<span class='line'>159</span> </span><span class="WHIT">                </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">==</span><span class="WHIT"> </span><span class="NAME">wlen</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>160</span> </span><span class="WHIT">                    </span><span class="NAME">drawLines.push</span><span class="PUNC">(</span><span class="PUNC">{</span><span class="NAME">text</span><span class="PUNC">:</span><span class="NAME">str</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">:</span><span class="NAME">height</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>161</span> </span><span class="WHIT">                    </span><span class="COMM">// me._drawTextLine(context, str, height);</span><span class="WHIT">
<span class='line'>162</span> </span><span class="WHIT">                    </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">str</span><span class="WHIT"> </span><span class="PUNC">!==</span><span class="WHIT"> </span><span class="NAME">word</span><span class="WHIT"> </span><span class="PUNC">&&</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">newWidth</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">newWidth</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>163</span> </span><span class="WHIT">                    </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">lineHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>164</span> </span><span class="WHIT">                </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>165</span> </span><span class="WHIT">            </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>166</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>167</span> 
<span class='line'>168</span> </span><span class="WHIT">        </span><span class="NAME">me.textWidth</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>169</span> </span><span class="WHIT">        </span><span class="NAME">me.textHeight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>170</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">me.width</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">me.width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>171</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="PUNC">!</span><span class="NAME">me.height</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">me.height</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>172</span> 
<span class='line'>173</span> </span><span class="WHIT">        </span><span class="COMM">//vertical alignment</span><span class="WHIT">
<span class='line'>174</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">startY</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>175</span> </span><span class="WHIT">        </span><span class="KEYW">switch</span><span class="PUNC">(</span><span class="NAME">me.textVAlign</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>176</span> </span><span class="WHIT">            </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">'middle'</span><span class="PUNC">:</span><span class="WHIT">
<span class='line'>177</span> </span><span class="WHIT">                </span><span class="NAME">startY</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.height</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">me.textHeight</span><span class="WHIT"> </span><span class="PUNC">>></span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>178</span> </span><span class="WHIT">                </span><span class="KEYW">break</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>179</span> </span><span class="WHIT">            </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">'bottom'</span><span class="PUNC">:</span><span class="WHIT">
<span class='line'>180</span> </span><span class="WHIT">                </span><span class="NAME">startY</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.height</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">me.textHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>181</span> </span><span class="WHIT">                </span><span class="KEYW">break</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>182</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>183</span> 
<span class='line'>184</span> </span><span class="WHIT">        </span><span class="COMM">//draw background</span><span class="WHIT">
<span class='line'>185</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">bg</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.background</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>186</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">bg</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>187</span> </span><span class="WHIT">            </span><span class="NAME">context.fillStyle</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">bg</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>188</span> </span><span class="WHIT">            </span><span class="NAME">context.fillRect</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">me.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">me.height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>189</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>190</span> 
<span class='line'>191</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">me.outline</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">context.strokeStyle</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.color</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>192</span> </span><span class="WHIT">        </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="NAME">context.fillStyle</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.color</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>193</span> 
<span class='line'>194</span> </span><span class="WHIT">        </span><span class="COMM">//draw text lines</span><span class="WHIT">
<span class='line'>195</span> </span><span class="WHIT">        </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">&lt;</span><span class="WHIT"> </span><span class="NAME">drawLines.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="PUNC">++</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>196</span> </span><span class="WHIT">            </span><span class="NAME">line</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">drawLines</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>197</span> </span><span class="WHIT">            </span><span class="NAME">me._drawTextLine</span><span class="PUNC">(</span><span class="NAME">context</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">line.text</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">startY</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">line.y</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>198</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>199</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>200</span> 
<span class='line'>201</span> </span><span class="WHIT">    </span><span class="COMM">/**
<span class='line'>202</span>      * 在指定的渲染上下文上绘制一行文本。
<span class='line'>203</span>      * @private
<span class='line'>204</span>      */</span><span class="WHIT">
<span class='line'>205</span> </span><span class="WHIT">    </span><span class="NAME">_drawTextLine</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">context</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">text</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>206</span> </span><span class="WHIT">        </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">me</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">this</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">me.width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>207</span> 
<span class='line'>208</span> </span><span class="WHIT">        </span><span class="KEYW">switch</span><span class="PUNC">(</span><span class="NAME">me.textAlign</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>209</span> </span><span class="WHIT">            </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">'center'</span><span class="PUNC">:</span><span class="WHIT">
<span class='line'>210</span> </span><span class="WHIT">                </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">>></span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>211</span> </span><span class="WHIT">                </span><span class="KEYW">break</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>212</span> </span><span class="WHIT">            </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">'right'</span><span class="PUNC">:</span><span class="WHIT">
<span class='line'>213</span> </span><span class="WHIT">            </span><span class="KEYW">case</span><span class="WHIT"> </span><span class="STRN">'end'</span><span class="PUNC">:</span><span class="WHIT">
<span class='line'>214</span> </span><span class="WHIT">                </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>215</span> </span><span class="WHIT">                </span><span class="KEYW">break</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>216</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>217</span> 
<span class='line'>218</span> </span><span class="WHIT">        </span><span class="KEYW">if</span><span class="PUNC">(</span><span class="NAME">me.outline</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">context.strokeText</span><span class="PUNC">(</span><span class="NAME">text</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">x</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>219</span> </span><span class="WHIT">        </span><span class="KEYW">else</span><span class="WHIT"> </span><span class="NAME">context.fillText</span><span class="PUNC">(</span><span class="NAME">text</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">x</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>220</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>221</span> 
<span class='line'>222</span> </span><span class="WHIT">    </span><span class="NAME">Statics</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="COMM">/** @lends Text */</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>223</span> </span><span class="WHIT">        </span><span class="COMM">/**
<span class='line'>224</span>          * 测算指定字体样式的行高。
<span class='line'>225</span>          * @param {String} font 指定要测算的字体样式。
<span class='line'>226</span>          * @return {Number} 返回指定字体的行高。
<span class='line'>227</span>          */</span><span class="WHIT">
<span class='line'>228</span> </span><span class="WHIT">        </span><span class="NAME">measureFontHeight</span><span class="PUNC">:</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">font</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>229</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">docElement</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">document.documentElement</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">fontHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>230</span> </span><span class="WHIT">            </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">elem</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Hilo.createElement</span><span class="PUNC">(</span><span class="STRN">'div'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="NAME">style</span><span class="PUNC">:</span><span class="PUNC">{</span><span class="NAME">font</span><span class="PUNC">:</span><span class="NAME">font</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">position</span><span class="PUNC">:</span><span class="STRN">'absolute'</span><span class="PUNC">}</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">innerHTML</span><span class="PUNC">:</span><span class="STRN">'M'</span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>231</span> 
<span class='line'>232</span> </span><span class="WHIT">            </span><span class="NAME">docElement.appendChild</span><span class="PUNC">(</span><span class="NAME">elem</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>233</span> </span><span class="WHIT">            </span><span class="NAME">fontHeight</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">elem.offsetHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>234</span> </span><span class="WHIT">            </span><span class="NAME">docElement.removeChild</span><span class="PUNC">(</span><span class="NAME">elem</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>235</span> </span><span class="WHIT">            </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">fontHeight</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>236</span> </span><span class="WHIT">        </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>237</span> </span><span class="WHIT">    </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>238</span> 
<span class='line'>239</span> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>240</span> </span></pre></body></html>